Knock provides developers with a flexible notifications infrastructure, enabling them to manage and deliver notifications across multiple channels without custom code. The decision to build an in-house notification system or buy from a third-party vendor is a common challenge, and Knock offers a framework to help teams make this choice by considering factors such as differentiation, correctness, flexibility, development time, maintainability, and reliability. Building a notification system in-house can quickly escalate in complexity, as it requires managing cross-channel routing, user preferences, and maintaining visibility across teams. Knock's solution offers pre-built components and an interactive dashboard, which can significantly reduce development time and maintain system consistency and compliance. Leading organizations like LinkedIn and Facebook have dedicated substantial resources to building their notification systems, but Knock provides an alternative with its enterprise-ready platform, which includes features such as batching notifications, stateful in-app notifications, and comprehensive analytics.